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Author Topic: Pulsing A Bifilar Coil And Collecting From It And Various Ways Of Going About It  (Read 4956 times)

Offline verpies

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...if it were ideal again and we used an inductor with say a 0v drop diode, then the transfer would be a complete transfer, the 10v cap would end at 0v and the 0v cap would end at 10v...
Yes, ...or -10V

P.S.
At low currents, a MOSFET synchronous rectifier acts almost like a 0V diode.

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Offline Magluvin

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Yes, ...or -10V

P.S.
At low currents, a MOSFET synchronous rectifier acts almost like a 0V diode.


I have heard of them and read a little, I would like to try them.  Any special part no you can recommend as The mosfet Im working with right now are  great switchers but are most eff at like just above 4v, so just wondering if there are some that are more flexible.  I use them for vape hukahs to switch on 3.7v to .2ohm coils. The transistor on res is .0014ohm. Doesnt get beyond just warm without a heat sink. But i really like the low ohm characteristics.

A lot of vape devices use a control board with color display and dc-dc boost with power control levels.  The guy om building them for got into the biz of renting them at night clubs and was doing good till the hukah were failing and the company went under. So im bulding new ones and im just paralleling  18650 cells and running low ohm coils, but on the handles I put 2 push buttons one for full power and one for a lower setting. All the circuits Ive seen either want to use pwm to lower the power or dc-dc boost for more.  I just use a 15k to hold the gate at 0v and the high button puts direct source + and the low button I use a 6.8k res to cause a V division between it and the 15k and it works.  So now the cust dont complain that the thing aint working right because they dont know how to adjust it cuz they are drunk, so just a high n low.. Simple.  No power switches just plug a handle in either side or both and that is the on switch for all the lights, etc.

Has a thick beam laser on top. The new one Im finishing has a laser and a wobble mirror on a cd motor to make a laser cone. Looks crazy when the blow the fog on it.

I make it all with hand tools.

Mags

Mags


Offline Jimboot

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I have heard of them and read a little, I would like to try them.  Any special part no you can recommend as The mosfet Im working with right now are  great switchers but are most eff at like just above 4v, so just wondering if there are some that are more flexible.  I use them for vape hukahs to switch on 3.7v to .2ohm coils. The transistor on res is .0014ohm. Doesnt get beyond just warm without a heat sink. But i really like the low ohm characteristics.

A lot of vape devices use a control board with color display and dc-dc boost with power control levels.  The guy om building them for got into the biz of renting them at night clubs and was doing good till the hukah were failing and the company went under. So im bulding new ones and im just paralleling  18650 cells and running low ohm coils, but on the handles I put 2 push buttons one for full power and one for a lower setting. All the circuits Ive seen either want to use pwm to lower the power or dc-dc boost for more.  I just use a 15k to hold the gate at 0v and the high button puts direct source + and the low button I use a 6.8k res to cause a V division between it and the 15k and it works.  So now the cust dont complain that the thing aint working right because they dont know how to adjust it cuz they are drunk, so just a high n low.. Simple.  No power switches just plug a handle in either side or both and that is the on switch for all the lights, etc.

Has a thick beam laser on top. The new one Im finishing has a laser and a wobble mirror on a cd motor to make a laser cone. Looks crazy when the blow the fog on it.

I make it all with hand tools.

Mags

Mags
I'm impressed. Do you sell them online? 



I've switched out the transformer in Nelsons circuit and I have my two ribbon TBP stacked on top of each other in parallel instead. Yellow trace is on one coil & gnd and blue on internal tap point. I only get the ring if I use two coils.



Offline Magluvin

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I'm impressed. Do you sell them online? 



I've switched out the transformer in Nelsons circuit and I have my two ribbon TBP stacked on top of each other in parallel instead. Yellow trace is on one coil & gnd and blue on internal tap point. I only get the ring if I use two coils.

No. Just doing them for the guy that rents them.

Im not sure what you are saying about the coils

Mags



Offline Jimboot

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Sorry Mags, that was a bit vague. 2TBP stacked on top of each other with ferrite through the centre of them.

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Offline Jimboot

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Added a third coil that was wound from a Cat5 cable so a TBF wound in helix form. Wired same a ch2.

Offline Magluvin

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One word sums it up......damn.....



https://www.youtube.com/watch?v=ChV7n0EY2h0




He hits you with a wet phone book....in the face.....with the mother of all nuggets.....find it!


Sweet video TK from the guy who dislikes scopes and proper measurement.....

Connect that to the nano pulser? To the neon terminals? Test that for output?

Mags

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Offline Dog-One

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The toroid transformer that is in Nelson's circuit...

I found something interesting one might want to consider about it.

Connected as Nelson shows in bucking style configuration, if pulsed with DC,
there's an interesting back swing not obvious just looking at a voltage or current
signal, but when you turn on the math trace and calculate watts, you can clearly
see the reverse power spike.



Offline Jimboot

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The toroid transformer that is in Nelson's circuit...

I found something interesting one might want to consider about it.

Connected as Nelson shows in bucking style configuration, if pulsed with DC,
there's an interesting back swing not obvious just looking at a voltage or current
signal, but when you turn on the math trace and calculate watts, you can clearly
see the reverse power spike.


Is that just the toroid your pulsing?


Offline Dog-One

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Is that just the toroid your pulsing?

Yeap.  When it's wired as bucking you can see the current and voltage doesn't respond
exactly the same, hence there is a power spike created opposite to the direction of the
input flow.  Back EMF?   Seems more than that.  It's actual energy per time, power.

Doing some fiddling with the turns ratio you can change the characteristics of the spike.

I couldn't for the life of me figure out how Nelson's training circuit could generate spikes,
but I see it now.

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Offline Jimboot

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Yeap.  When it's wired as bucking you can see the current and voltage doesn't respond
exactly the same, hence there is a power spike created opposite to the direction of the
input flow.  Back EMF?   Seems more than that.  It's actual energy per time, power.

Doing some fiddling with the turns ratio you can change the characteristics of the spike.

I couldn't for the life of me figure out how Nelson's training circuit could generate spikes,
but I see it now.


sok more winding to do. :)



Offline TinselKoala

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Connect that to the nano pulser? To the neon terminals? Test that for output?

Mags

Didn't I try that already? Maybe I forgot to post the picture.


 

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